Select the correct answer.
Which data set has the widest spread?

A.
data set A: 1, 1, 2, 1, 2, 1
B.
data set B: 2, 2, 4, 4, 3, 3
C.
data set C: 1, 1, 2, 2, 1, 5
D.
data set D: 3, 5, 5, 5, 5, 4